Twitter UI Customizer is a Chrome extension developed by Ablaze｜Floorp that enhances the customizability of your Twitter user interface. With this extension, you can easily change the color of buttons, edit the order of buttons, and add additional options to the buttons below your tweets.

One of the key features of Twitter UI Customizer is the ability to customize the color of various buttons, including "Edit Unsent Tweet," "Follow Button for Non-Followers," "Follow Button for Current Followings," "Unfollow Button," "Profile Settings," and "Final Confirmation (e.g., logout)." You can easily set the border color, background color, and text color for each button.

In addition, you can rearrange the order of buttons below your tweets and add options such as "Add to Bookmarks" and "Copy Tweet Link." If the buttons start overflowing horizontally, you can enable a scrollbar for better visibility.

The extension also allows you to customize the sidebar by changing the order of items and adding "Lists," "Twitter Circle," and "Topics." If the vertical spacing of the sidebar becomes too large, you can reduce it to make it more compact.

Furthermore, you have the option to choose the icon for Twitter's top left corner and the startup icon. You can select from options like "Default," "Hidden," "Dog," "Bird," and even upload a custom image as the icon. For custom icons, you can choose between a circular or square shape.

Other features include the ability to hide recommended users on the timeline, display client information, and write custom CSS.

Twitter UI Customizer is a free Chrome extension that offers a wide range of customization options to enhance your Twitter user experience. Check out the GitHub page for more information and to get started with the extension.